Abstract: Aiming at the issue of low shear strength in laser direct connection joints between SUS304 stainless steel and PCCF30(30% short carbon fiber reinforced polycarbonate), a PET (polyethylene terephthalate) intermediate layer was added between SUS304 stainless steel and PCCF30, and laser texture pre-treatment was performed on the surface of the stainless steel to improve the strength of the laser connection joint between SUS304 stainless steel and PCCF30. The response surface method was used to establish a mathematical model between the laser direct connection process parameters and texture pre-treatment process parameters, as well as the joint shear strength and texture pre-treatment time. The interactive effects of various process parameter combinations on the joint shear strength were analyzed. The results show that the laser direct connection power-texture scanning times and laser direct connection power-laser connection speed have a significant impact on the joint shear strength. The model validation and optimization results show that the predicted values of the constructed model are in good agreement with the experimental values, and the model is reliable.